tair ar bymtheg

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Welsh

Welsh numbers (edit)
[a], [b], [c] ←  17 18 19  → [a], [b], [c]
    Cardinal (feminine / vigesimal): tair ar bymtheg, ugain namyn dwy
    Cardinal (decimal): un deg wyth
    Cardinal (vigesimal): deunaw
    Ordinal (masculine / vigesimal): trydydd ar bymtheg
    Ordinal: deunawfed
    Ordinal abbreviation: 18fed

Etymology

From tair (three) +‎ ar (on) +‎ pymtheg (fifteen).

Pronunciation

Numeral

tair ar bymtheg f

  1. (cardinal number, vigesimal) feminine of tri ar bymtheg
    Synonyms: un deg wyth, deunaw
    • 1872 December 6, “Amgylchiad Gofidus”, in Y Dydd, page 4:
      Gwasanaethai merch ieuanc, tair ar bymtheg oed, o'r enw Elizabeth Rees, gyda Mr. Mitchell, yn Dylogau — fferm ar lan yr afon Ystwyth, Ceredigion.
      A young woman, eighteen* years of age, by the name of Elizabeth Rees, was in service with Mr Mitchell in Dolygau at a farm on the river Ystwyth in Cardiganshire.
      The Cambrian News and Merionethshire Standard of the same date says that she was 23 years old.

Mutation

Mutated forms of tair ar bymtheg
radical soft nasal aspirate
tair ar bymtheg dair ar bymtheg nhair ar bymtheg thair ar bymtheg

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.